This will output, which is a shallow copy of the selected portion of the array. The “slice” method can also be used to copy arrays or only their parts.įor instance, if you have an array of numbers, you can use the “slice” method to extract a section of the array as follows: const numbers = Ĭonst slicedNumbers = numbers.slice(1, 3) It can be used to extract a specific section of an array or string without modifying the original. The “slice” method can be used in both arrays and strings in JavaScript. If the “end” parameter is not specified, the “slice” method extracts all the elements from the “start” parameter to the end of the array. The “start” parameter is mandatory, while the “end” parameter is optional. Here, the “start” parameter specifies the index at which to begin extraction, and the “end” parameter specifies the index at which to end extraction. We will specify the start and end index and the sliced string will be shown in an alert.The syntax for using the “slice” method in JavaScript is: array.slice(start, end) In the following example, we will use both parameters in the slice method. Javascript slice string with start and end indices example Tip: The array slice function is different to string slice. Let us look at a few examples of using javascript string slice. The original string remains the same after using the slice function.If a negative value is given then it will start counting from the end of given string.You can use positive or negative numbers in the start and end indices.The End_index specifies where to end extracting the substring.The start_index specifies where to start extracting substring.See an example of Slice method Syntax of slice methodįollowing is the syntax to use slice javascript method: The start and end positions are index numbers that can be positive or negative values.įollowing are a few examples of using JS slice function but let us first look at its syntax. The slice method of strings in Javascript is used to extract the substring from a given string by specifying start and end positions. 5 A string slice with negative start and end index example.
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